Stencil-duplicating apparatus.



S. 0. EDMONDS.

STENOIL DUPLIOA'I'ING APPARATUS. APPLICATION 1-11.21: MAY 9, 1908.

1,001,826. Patented Aug. 29, 1911..

UNTTED TATES PATENT @TTTQE.

SAMUEL O. EDMONDS, OF NEW YORK, N. Y., ASSIGNOR TO A. B. DICK COMPANY, OF

' CHICAGO, ILLINOIS, A C ORPOBATION OF ILLINOIS.

STENCIL-DUPLICATING APPARATUS.

Specification of Letters Patent.

Application filed May 9, 1908.

Patented Aug. 29, 1911. Serial No. 431,937.

To all whom it may concern;

Be it known that I, SAMUEL O. EDMONDS, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Stencil- Duplicating Apparatus, (Case A,) of which the following is a specification.

This invention relates to stencil-duplicat ing apparatus such as the machines now in common use employing a rotary drum on the periphery of which a stencil-sheet is secured, an inking device underlying the stenoil-sheet, and a pressure roller arranged to coact with the drum to print upon a sheet.

More particularly, the invention has reference to the devices for supplying ink to the stencil-sheet from an ink supply exterior to the cylinder.

In stencil-duplicating machines as now used, the drum is provided with a foraminated sheet extending around a portion of the cylindrical surface thereof and forming a stencil-carrier, over this a pad of absorbent material is laid and its ends secured to the drum, and the stencil-sheet overlies this pad and is secured to the drum. The ink for printing is supplied through the open ings in the carrier to the pad which is capable of holding a considerable quantity of ink and passes from the pad through the interstices of the stencil.

In accordance with my invention means are provided for supplying ink to and dis tributing it over the inner surface of the stencil-carrier from an ink-supply mounted adjacent to but outside of the drum. In the preferred embodiment of the invention, this includes a roller mounted within the drum and pressed outwardly thereof by suitable springs and guiding devices for permitting the roller to contact with the interior surface of the carrier and preventing it from contacting with the securing devices for the ends of the carrier, the pad and the stencilsheet. Ink is supplied to the roller when it lies at the open side of the drum, and for this purpose the guiding devices above mentionedmay be arranged to permit of the roller projecting beyond the periphery of the drum. Movement of the roller to this position may carry it into contact with a supply roller or other ink-supply device so that by rotating one or the other of these rollers the surface of the ink-roller will re ceive a supply of ink.

The preferred embodiment of my invention is illustrated in the accompanying drawings in which Figure 1 is a longitudinal section of a stencil-duplicating machine and Fig. 2 is a detail view of the inking-roller and a portion of the drum.

Referring to these drawings, the machine consists of a base A on which are erected side-frames B which support a stationary, horizontally-disposed shaft C. The drum D of the machine consists of heads d loosely mounted upon the shaft 0 and connected together by bars (Z. A foraminated sheet E is secured to the heads (Z and extends around a substantial portion of the cylindrical surface of the drum D, the ends of this sheet being secured to two of the bars cl and the sheet forming a stencil-carrier. An inkingpad F overlies the stencil-carrier E; this pad consists of any suitable absorbent textile fabric and has loops formed in its ends to receive rods f by which the ends of the pad are secured to the drum of the machine adjacent to the ends of the stencil-carrier E. The stencil-sheet is adapted to overlie the ink-pad F and its forward end is secured to the drum by buttons 7 on a bar cl extending between the heads ofthe drum; the rear end of the sheet may be secured to the drum in any suitable manner, if desired, or may be held only by the ink on the pad F. Secured to one of the heads of the drum is a gear 0Z meshing with a gear (Z secured on a stub shaft mounted for rotation in a bearing in one of the side-frames B and provided with a suitable handle by which the drum may be turned upon the stationary shaft 0,

Directly below the drum is a pressureroller Gr mounted for rotation in arms 9 pivotally mounted upon the side-frames B and acted upon by springs g to carry the roller G to the upward or operative position A combined paper stop and stripper of well-known construction is shown at g for arresting a sheet in proper position for printing and for preventing the sheet from sticking to the surface of the drum after it has been imprinted upon.

Secured upon the shaft C adjacent to the inner face of each of the heads (Z of the drum is an arm H on the end of which is pivotally mounted a lever h and one end of this lever is connected by a spring it to a projection on the arm H. In the opposite ends of the levers h an inking-roller I is mounted for rotation the surface of this roller being provided with any suitable absorbent material, or with a gelatin composition such as is commonly employed in inking-rollers. The extreme ends of the shaft of the roller I carry rollers i each provided, preferably, with a band of rubber about its periphery, and each of the rollers i is adapted to travel upon a cam surface 2" formed on the drum head (Z adjacent thereto. These cam surfaces are preferably formed, as shown in Fig. 1, from which it will be seen that a surface 6 is provided concentric with the drum such as to permit the inking-roller I to make contact with the interior surface of the stencil-carrier E. At the ends of the portion '5 are raised port-ions i adapted to coact with the rollers t to lift the inking-roller I against the tension of springs 71, so that the roller will not engage the securing devices for the ends of the stencil-carrier, the ink-pad and the stencilsheet. Between the two portions 2' and at the open side of the drum, the cam surfaces are so shaped, as shown at i as to permit the inking-roller I to be turned about its pivotal support by the springs 72. to such posit-ion that it projects beyond the periphery of the drum. Ink is supplied to the roller I when it is in this position from an ink-supply device exterior to the drum. An ink receptacle J is shown secured to the frames B of the machine adjacent to the drum and having a roller j mounted for rotation with a substantial portion thereof immersed within the ink; a second roller 7" is mounted with its surface in contact with that of the roller so as to receive ink there from, the roller j being supported by arms j loose on the shaft of the roller 7'. In this way the roller y" can be moved to an operative position in which it is shown in full lines in Fig. 1, or to inoperative position as indicated by the dotted lines. A handle 7' is shown as secured to the shaft of the roller 7' so that the latter may be rotated.

The machine thus constructed is operated in the usual manner to imprint upon sheets passed between the drum and the pressureroller. Ink is supplied through the openings in the foraminated stencil-carrier E to the pad F and from the pad through the interstices of the stencil. In each revolution of the drum, the inking-roller I moves radially of the drum about the pivotal connection of the arm H and lever h in accordance with the shape of the cam surfaces 6. While the stencil-carrier 'E is passing under the roller I the latter is allowed to move outwardly until its surface engages the inner surface of the carrier E and the roller thus serves to supply ink to and distribute the ink over the inner surface of the carrier and to force the ink through the openings in the carrier to the pad F. WVhen it is necessary to replenish the supply of ink the rotation of the drum D is arrested when the roller I is atthe open portion of the drum. The roller 9" is then turned to the position in which its surface engages the surface of the roller I and is then rotated by means of the handle j so that ink is transferred from the receptacle J to the inking-roller I and evenly distributed over the surface of the roller I. To facilitate this the cam surfaces 2' are so shaped as to permit of the roller I being projected beyond the periphery of the drum D when said roller is at the open portion of the drum, and after a sufficient quantity of ink has been transferred to the surface of the roller I, the roller 7" is moved back to the inoperative position and the operation of the machine is continued in the usual manner.

Having described my invention what I claim as new therein and desire to secure by Letters Patent of the United States is:

1. In stencil-duplicating apparatus, the combination'of a drum having a foraminated sheet extending about a portion of the cylindrical surface thereof, said drum be ing open upon one side thereof, means: for securing a stencil-sheet upon said sheet, a pressure-roller, an inking member mounted within the drum and adapted to supply ink through the openings in said foraminated sheet, an inking device mounted outside the drum but adjacent thereto and means actuated in accordance with the rotation of the drum for moving said inking member through said opening in the cylindrical wall of the drum'to permit it to contact with said inking device so that said device may supply ink to said me1nber,substantially as set forth.

2, In stencil-duplicating apparatus, the

ing said sheet, a pressure-roller, an inking member mounted Within the drum and adapted to contact With the interior surface of said foraminated sheet, an inking device mounted outside the drum, means actuated in accordance with the rotation of the drum for moving said inking member through said opening in the cylindrical Wall of the drum to permit it to contact With said inking device, and means for moving said inking member and said inking device While they are in contact to supply ink to said inking member, substantially as set forth.

3. In stencil-duplicating apparatus, the combination of a drum, means for securing a stencilsheet thereon, a pressure-roller, an inking-roller-mounted Within the drum, an inking-member mounted outside the drum, means for bringing said roller and member into contact, and means for moving the roller and member While in contact to trans fer ink to the roller, substantially as described.

4:. In stencil-duplicating apparatus, the combination of a drum having a foraminated sheet extending about a portion of the cylindrical surface thereof, said drum being open on one side thereof, means for securing a stencil-sheet to the drum overlying said foraminated sheet, a pressure-roller, an inking roller mounted Within the drum and adapted to cont-act With the interior surface of said foraminated sheet, an ink-' ing device mounted outside the drum, cams for positioning said roller through said opening in the cylindrical Wall of the drum to permit it to contact With said inking device and means for moving the roller and device While in contact to transfer ink to the roller, substantially. as set forth.

5. In stencil-duplicating apparatus, the combination of a drum, a foraminated stencil-carrier extending about the cylindrical surface thereof, an ink-pad overlying said carrier, means for securing a stencil-sheet to the drum over said pad, an inking-roller mounted Within the drum and adapted to contact With the inner surface of said carrier, an inking-roller mounted outside the drum, an ink-receptacle from Which ink is supplied to said last-mentioned roller, means for bringing said rollers into contact, and means for rotating one of said rollers, substantially as described.

6. In stencil-duplicating apparatus, the combination of a drum, a foraminated stenoil-"carrier extending about a port-ion of the cylindrical surface thereof, means for securing a stencil-sheet to the drum over said carrier, an inking-roller mounted Within the drum and adapted to contact With the inner surface of said carrier and feed ink through the carrier to said sheet, said drum being open on the side opposite said carrier, means for projecting said roller through said open side of the drum, an inkingmember mounted outside the drum with which said roller is adapted to contact, means for supplying ink to said member, and means for moving the member and roller While in contact to 'transfer ink to said roller, substantially as described.

7. In stencil-duplicating apparatus, the combination of a drum, a stencil-carrier secured thereto and extending about a portion of the cylindrical surface thereof, an ink-pad overlying said carrier, means for securing a stencil-sheet to the drum over said pad, means for rotating the drum, an inking-roller mounted Within the drum and held against rotational movement with the drum, a spring for moving the roller out- Wardly from the center of the drum, cam

surfaces for positioning said roller, said cam surfaces permitting the roller to contact with the inner surface of the carrier and to project beyond the surface of the drum, a second inking-roller mounted outside the drum With Which said roller is adapted to contact, means for supplying ink to said second roller, and means for rotating one of said rollers, substantially as described.

8. In stencil-duplicating apparatus, the combination of a drum having a foraminated sheet extending about a portion of the cylindrical surface thereof, said drum being open upon one side thereof, an inkingroller mounted Within the drum, means actuated by the rotation of the drum for moving the said roller through the open side of the drum and means for applying ink to the roller When so moved, substantially as set forth.

9. In stencil-duplicating apparatus, the combination of a drum having a foraminated sheet extending about a portion of the cylindrical surface thereof, said drum being open upon one side thereof, an inking-roller mounted Within the drum and means actuated in accordance with the rotation of the drum for moving the roller radially outward When the open side of the drum is adjacent to the roller and then radially inward, substantially as set forth.

10. In stencil duplicating apparatus, the combination of a drum having a foraminated sheet extending about a port-ion of the cylindrical surface thereof, said drum being open upon one side thereof, an inking-roller mounted Within the drum, means actuated in accordance With the rotation of the drum for moving the roller radially This specification signed and witnessed outward through the open side of the drum this 7th day of May, 1908.

end then r adially inward into ooactio-n With SAMUEL O EDMOND S the lnterlor surface of the drum and means for supplying ink to the pressureroller When so moved outwardly, substantially as set forth.

Witnesses:

D. J. EDMONDS, I. MoIN'rosI-I.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

